Original Contribution by Hellmuth Michaelis
<hm@kts.org>.
This section is really only relevant to European ISDN users. The cards supported are not yet(?) available for North American ISDN standards.
You should be aware that this code is largely under development. Specifically, drivers have only been written for two manufacturers cards.
PC ISDN cards support the full bandwidth of ISDN, 128Kbs. These cards are often the least expensive type of ISDN equipment.
Under FreeBSD 2.1.0 and 2.1.5, there is early unfinished ISDN code under /usr/src/gnu/isdn. This code is out of date and should not be used. If you want to go this route, get the bisdn stuff. This code has been removed from the main source tree starting with FreeBSD 2.2.
There is the bisdn ISDN package available from ftp.muc.ditec.de supporting FreeBSD 2.1R, FreeBSD-current and NetBSD. The latest source can be found on the above mentioned ftp server under directory isdn as file bisdn-097.tar.gz.
There are drivers for the following cards:
There are several limitations with the bisdn stuff. Specifically the following features usually associated with ISDN are not supported.
A majordomo maintained mailing list is available, to subscribe, send the usual majordomo requests to isdn-request@muc.ditec.de.